Abstract: Two novel ice-making systems with evaporative supercooled water are introduced with different dehumidification methods.One is the improved ice-making system with liquid desiccant,in which a subsystem of evaporative precooling water is added and the dehumidified air is cooled by cooling water of system itself.The improved system can not only avoid the blocking problem in the traditional supercooled water method,but also can utilize the low humidity ratio air.The other is an ice-making system with condensation dehumidification,which includes two ice-making subsystems,with evaporative supercooled water and supercooled condensed water of moist air separately,and also solves the blocking problem with the traditional supercooled water method.The system is relatively simple in comparison with the improved ice-making system with liquid desiccant.The analysis on thermodynamic properties shows that in comparison with the traditional supercooled water system,the coefficient of performance of the improved ice-making system of evaporative supercooled water with liquid desiccant can be increased by more than 33.8%,while that with condensation dehumidification is basically the same under a certain working condition.

Key words: evaporation, dehumidification, supercooled water, ice slurry, coefficient of performance

摘要： 根据不同的除湿方法,提出了两种新型蒸发式过冷水制冰系统,一种是改进型溶液除湿蒸发式过冷水制冰系统,改进的系统增加了水预冷子系统,并利用自身的冷却水对除湿后的空气进行降温,其不仅解决了传统过冷水法中的冰堵问题,也实现了低含湿量空气的梯级利用。另一种是基于冷冻除湿的蒸发式过冷水制冰系统,它包括蒸发式过冷水制冰与湿空气冷凝水过冷制冰两个子系统,其也克服了传统过冷水法中易冰堵的缺陷,与改进型溶液除湿蒸发式过冷水系统相比该系统更简单。根据系统性能计算,在一定工况下与传统过冷水法相比,改进型溶液除湿蒸发式过冷水系统的制冰性能系数可提高33.8%以上,基于冷冻除湿的蒸发式过冷水系统的制冰性能系数则与之基本相同。

关键词: 蒸发, 除湿, 过冷水, 流态冰, 性能系数